{"id":207931,"date":"2025-07-08T12:40:33","date_gmt":"2025-07-08T04:40:33","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207931\/"},"modified":"2025-07-08T12:40:33","modified_gmt":"2025-07-08T04:40:33","slug":"%e4%b8%ba%e4%bb%80%e4%b9%88-benchmark-%e8%bf%90%e8%a1%8c%e5%85%ad%ef%bc%88%ef%bc%9f%ef%bc%89%e6%ac%a1","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207931\/","title":{"rendered":"\u4e3a\u4ec0\u4e48 Benchmark \u8fd0\u884c\u516d\uff08\uff1f\uff09\u6b21"},"content":{"rendered":"

<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u4e3a\u4ec0\u4e48 Benchmark \u8fd0\u884c\u516d\uff08\uff1f\uff09\u6b21<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-26 22:27:36<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u79ef\u7d2f\u77e5\u8bc6\uff0c\u80dc\u8fc7\u79ef\u84c4\u91d1\u94f6\uff01\u6bd5\u7adf\u5728Golang\u5f00\u53d1\u7684\u8fc7\u7a0b\u4e2d\uff0c\u4f1a\u9047\u5230\u5404\u79cd\u5404\u6837\u7684\u95ee\u9898\uff0c\u5f80\u5f80\u90fd\u662f\u4e00\u4e9b\u7ec6\u8282\u77e5\u8bc6\u70b9\u8fd8\u6ca1\u6709\u638c\u63e1\u597d\u800c\u5bfc\u81f4\u7684\uff0c\u56e0\u6b64\u57fa\u7840\u77e5\u8bc6\u70b9\u7684\u79ef\u7d2f\u662f\u5f88\u91cd\u8981\u7684\u3002\u4e0b\u9762\u672c\u6587\u300a\u4e3a\u4ec0\u4e48 Benchmark \u8fd0\u884c\u516d\uff08\uff1f\uff09\u6b21\u300b\uff0c\u5c31\u5e26\u5927\u5bb6\u8bb2\u89e3\u4e00\u4e0b\u77e5\u8bc6\u70b9\uff0c\u82e5\u662f\u4f60\u5bf9\u672c\u6587\u611f\u5174\u8da3\uff0c\u6216\u8005\u662f\u60f3\u641e\u61c2\u5176\u4e2d\u67d0\u4e2a\u77e5\u8bc6\u70b9\uff0c\u5c31\u8bf7\u4f60\u7ee7\u7eed\u5f80\u4e0b\u770b\u5427~<\/p>\n

\u95ee\u9898\u5185\u5bb9
\n <\/p>\n

\u6b64\u4ee3\u7801\uff08\u6f14\u793a\u94fe\u63a5\uff09\uff1a<\/p>\n

package main\n\nimport (\n    \"fmt\"\n    \"testing\"\n)\n\nvar test = make([]int, 0)\n\nfunc main() {\n    fmt.println(testing.benchmark(testthis))\n}\n\nfunc testthis(b *testing.b) {\n    fmt.println(test)\n}<\/pre>\n
\u6709\u4e0b\u4e00\u4e2a\u8f93\u51fa\uff1a<\/p>\n
[]\n[]\n[]\n[]\n[]\n[]\n2000000000           0.00 ns\/op\n\nprogram exited.<\/pre>\n
\u4e3a\u4ec0\u4e48\u8f93\u51fa\u4e2d\u6709\u516d\u4e2a[]<\/code>\uff1f<\/p>\n
\u6b64\u4ee3\u7801\uff08\u6f14\u793a\u94fe\u63a5\uff09\uff1a<\/p>\n
package main\n\nimport (\n    \"fmt\"\n)\n\nvar test = make([]int, 0)\n\nfunc main() {\n    fmt.println(test)\n}<\/pre>\n
\u6709\u5355\u4e00\u8f93\u51fa\uff08\u5bf9\u6211\u6765\u8bf4\u5f88\u6e05\u695a\uff09\uff1a<\/p>\n
[]\n\nProgram exited.<\/pre>\n
 <\/p>\n
\u89e3\u51b3\u65b9\u6848<\/h2>\n
 <\/p>\n
\u60a8\u6b63\u5728\u4f7f\u7528\u57fa\u51c6\u51fd\u6570\u3002\u8fd9\u9700\u8981\u591a\u6b21\u6267\u884c\u4ee3\u7801\u624d\u80fd\u5f97\u5230\u6709\u610f\u4e49\u7684\u7ed3\u679c\u3002<\/p>\n
\u6b64\u5916\uff0c\u60a8\u7684\u57fa\u51c6\u6d4b\u8bd5\u5e76\u672a\u50cf\u5e94\u7f16\u7a0b\u7684\u57fa\u51c6\u6d4b\u8bd5\u90a3\u6837\u5b9e\u73b0\uff1a<\/p>\n
\u57fa\u51c6\u6d4b\u8bd5\u51fd\u6570\u5fc5\u987b\u8fd0\u884c\u76ee\u6807\u4ee3\u7801 b.n \u6b21\u3002\u5728\u57fa\u51c6\u6d4b\u8bd5\u6267\u884c\u671f\u95f4\uff0cb.n \u4f1a\u88ab\u8c03\u6574\uff0c\u76f4\u5230\u57fa\u51c6\u6d4b\u8bd5\u51fd\u6570\u6301\u7eed\u8db3\u591f\u957f\u7684\u65f6\u95f4\u4ee5\u53ef\u9760\u5730\u8ba1\u65f6\u3002 — <\/p>\n
\u56e0\u6b64 benchmark \u5c06\u68c0\u67e5\u8fd0\u884c\u65f6\u95f4\u5e76\u8c03\u6574 b.n \u4ee5\u83b7\u5f97\u826f\u597d\u4e14\u6709\u7528\u7684\u57fa\u51c6\u3002<\/p>\n
\u5f53\u4f60\u53ea\u6253\u5370 b.n \u65f6\uff0c\u4f60\u4f1a\u5f97\u5230\u5982\u4e0b\u8f93\u51fa\uff1a<\/p>\n
1\n100\n10000\n1000000\n100000000\n2000000000\n2000000000<\/pre>\n
\u56e0\u6b64\uff0c\u5728 6 \u6b21\u8fed\u4ee3\u4e2d\u7684\u6bcf\u4e00\u6b21\uff0c\u57fa\u51c6\u6d4b\u8bd5\u90fd\u4f1a\u544a\u8bc9\u60a8\u8fd0\u884c foor \u5faa\u73af b.n \u6b21\u3002<\/p>\n
\u9057\u61be\u7684\u662f\uff0c\u60a8\u65e0\u6cd5\u5728\u6f14\u793a\u4e2d\u4f7f\u7528\u6b63\u786e\u7684\u793a\u4f8b\uff0c\u56e0\u4e3a\u5b83\u4eec\u9700\u8981\u5f88\u957f\u65f6\u95f4\u3002\u4f46\u6b63\u786e\u7684\u662f\uff1a<\/p>\n
func testThis(b *testing.B) {\n    for i := 0; i < b.N; i++ {\n        fmt.Println(test)\n    }\n}<\/pre>\n
\u4eca\u5929\u5173\u4e8e\u300a\u4e3a\u4ec0\u4e48 Benchmark \u8fd0\u884c\u516d\uff08\uff1f\uff09\u6b21\u300b\u7684\u5185\u5bb9\u5c31\u4ecb\u7ecd\u5230\u8fd9\u91cc\u4e86\uff0c\u662f\u4e0d\u662f\u5b66\u8d77\u6765\u4e00\u76ee\u4e86\u7136\uff01\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u7684\u5185\u5bb9\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5f53\u524d\u4f4d\u7f6e\uff1a > > ...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-207931","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207931","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=207931"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207931\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207931"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207931"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207931"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}